/*
 * Copyright (c) 2024, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */
package com.oracle.truffle.espresso.shared.resolver;

import com.oracle.truffle.api.CompilerDirectives.TruffleBoundary;
import com.oracle.truffle.espresso.classfile.bytecode.Bytecodes;

public enum FieldAccessType {
    GetStatic(true, false),
    PutStatic(true, true),
    GetInstance(false, false),
    PutInstance(false, true);

    private final boolean isStatic;
    private final boolean isPut;

    FieldAccessType(boolean isStatic, boolean isPut) {
        this.isStatic = isStatic;
        this.isPut = isPut;
    }

    public static FieldAccessType fromOpCode(int opcode) {
        return switch (opcode) {
            case Bytecodes.GETSTATIC -> GetStatic;
            case Bytecodes.PUTSTATIC -> PutStatic;
            case Bytecodes.GETFIELD -> GetInstance;
            case Bytecodes.PUTFIELD -> PutInstance;
            default -> throw new IllegalArgumentException(unexpectedBytecodeError(opcode));
        };
    }

    @TruffleBoundary
    private static String unexpectedBytecodeError(int opcode) {
        return "Unexpected bytecode " + Bytecodes.nameOf(opcode);
    }

    public boolean isStatic() {
        return isStatic;
    }

    public boolean isPut() {
        return isPut;
    }
}
